Japanese corporate borrowers are selling bonds at a faster pace as speculation grows the Bank of Japan may raise interest rates again next month.

The yen jumped more than 1% against the U.S. dollar to a six-week high on Friday after faster-than-expected inflation in Tokyo supported bets for a Bank of Japan interest rate hike next month. The dollar sagged against its peers in trading thinned by the U.

The Japanese yen rose to a six-week high against the dollar Friday. While trading was thin because of the Black Friday holiday in the U.S., the moves are still worth watching after volatility in the Asian currency sparked market turmoil earlier this year.